static void draw_concat_vec4(ivl_expr_t expr)
{
/* Repeat the concatenation this many times to make a
super-concatenation. */
unsigned repeat = ivl_expr_repeat(expr);
/* This is the number of expressions that go into the
concatenation. */
unsigned num_sube = ivl_expr_parms(expr);
unsigned sub_idx;
assert(num_sube > 0);
/* Start with the most-significant bits. */
draw_eval_vec4(ivl_expr_parm(expr, 0));
for (sub_idx = 1 ; sub_idx < num_sube ; sub_idx += 1) {
/* Concatenate progressively lower parts. */
ivl_expr_t sube = ivl_expr_parm(expr, sub_idx);
/* Special case: The next expression is a NUMBER that
can be concatenated using %concati/vec4
instructions. */
if (ivl_expr_type(sube) == IVL_EX_NUMBER) {
draw_concat_number_vec4(sube, 1);
continue;
}
draw_eval_vec4(sube);
fprintf(vvp_out, " %%concat/vec4; draw_concat_vec4\n");
}
if (repeat > 1) {
fprintf(vvp_out, " %%replicate %u;\n", repeat);
}
}
/*
* Push a number into the vec4 stack using %pushi/vec4
* instructions. The %pushi/vec4 instruction can only handle up to 32
* non-zero bits, so if there are more than that, then generate
* multiple %pushi/vec4 statements, and use %concat/vec4 statements to
* concatenate the vectors into the desired result.
*/
static void draw_number_vec4(ivl_expr_t expr)
{
draw_concat_number_vec4(expr, 0);
}
